Road-binder-mixing machine.



W. F. DAVIS.

ROAD BINDER MIXING MACHINE. APPLICATION FILED MAR. 16, 1910.

Patented Mar. 19, 1912.

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W. F. DAVIS. ROAD BINDER MIXING MACHINE. APPLICATION FILED MAR. 1e, 1910. 1,020,640o

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. e w I WITNESS-EDS.'

WILLIAM F. DAVIS, OF KANSAS CITY, KANSAS.

RoADB1NDEaMIx1NG MACHINE.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application tiled March 16, 1910. SerialNo. 549,815.

To all whom it may concer/n,

Be it known that I, WILLIAM F. Davis, a citizen of the United States, residing at Kansas City, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Road- Binder-Mixing Machines, of which the followingvis a specification.

The invention relates to machines f or reducing material such as the material of roads, highways, railroad beds, waterproofing for cellars, reservoirs and the like into fine particles and mixing oil, asphalt, tar or other binders therewith for the purpose of binding said material together and forming a dense wear resisting and waterproof mass.

This application is intended to contain that part of an application now pendlng .1n the United States Patent Oiiice (Serial Number 520,547, filed Oct. 1st 1909, for an improvement in road oiling machines), which relates to a modified form of the 1nvention.

The present invention diers from that of the copending application in that the material to lloe treated must be brought to the machine, whereas the machine confined to the application referred to is taken to the material.

The term binder is employed throughout this specication and in the claims appended to designate oil,`asphalt, coal tar, or any binder that may be delivered to the machine in liquid form, Whether the liquid be hot or cold, even though said liquid congeal at normal temperature and liquid that will congeal at normal temperature is especially meant.

The term road material is employed throughout this specification and 1n the claims appended to designate earth, gravel, macadam or any material of which roads, railroad'beds, cellar lining, reservoir lining, or the like may be composed.

The present invention has provided a simvple and efficient machine, inexpensive in construction and operation, which reduces material such as road material and the like, preferably by cutting or scraping, in so short a time asl to allow the mixture of melted binders with the material before they have time to congeal, the material being so separated that cold binders are also mixed with cold material.

By feeding the material into the machine and separating and mixing the binder simultaneously and practically instantaneously with a rotary scraper having fast moving projections any material may be mixed, provided the binder is in liquid form when it reaches the material.

A .further object of the invent-ion is to provide projections that will handle gravel and macadam and provideV means to protect them from injury in case of their striking a large stone or other hard obstruction.

With these and other objects in view the invention consists in the novel features of construction, combination and ari-an einents of parts as hereinafter set forth, illustrated in the drawings and more particularly pointed out in the claims appended.

In the drawings z-Figure lis an elevationwof the improvedY machine. Fig. 2 is an end elevation of the machine. Fig. 3 is a vertical cross section of Fig. k1 on line L-L looking in the direction of arrows IV-IV but with certain parts removed. Fig. 4 is'a The yoke 83 rests on foot 84 and is prol vided with the boxes 9 in which is journaled the shaft 10. To shaft 10 is secured sprocket Wheel 14, gear 85 and disk 86. To the shaft 19 `is secured sprocket wheel 20, pulley 87 and hub 22, to which are secured angles 24, which in turn carry projections 25. Hub 22, angles 24 and projectlons 25 form a rotary scraper, but I do not Wish to confine the invention to this construction as it is manifest that other construction may be employed. The shaft 19 is journaled in boxes 18 which are supported by yoke 88 and secured thereto in any suitable manner, which in turn is supported by foot 84.

The side plates 33 are connected by cross ties 28 and 29 and are mounted by the cover 36. The space below the rotary scraper is closed by channels 90 which forms a part of the frame and on which rests a conveyer case 91 which is provided with a hopper 92 and journal box 93 and contains a conveyer 94 journaled near the outer end in box 93 and fitted with a bevel gear 95 enga ng bevel gear 85. In the form shown the ame consists of yoke 88 and channel 90, it is maniis shown broken oft' The pump 46 is held in position by arm 96 and is provided withsuction pipe 54 which and discharge pipe 50 which terminates in the branch pipe-53 and is driven by pin 97 in disk 86. Hole 99 is provided in disk 86 for the purpose of changing the stroke of the pump likewise the speed and capacity. Chain 61 engages sprocket wheel 20 and sprocket wheel 14for the purpose of driving the shaft 10, pump 46l and conveyer 94. The shaft 19 may be driven in any suitable manner but preferably by pulleyf 87 and at a high rate of speed. Shaft 19 drives shaft 10 through sprocket 20, chain 61 and sprocket 14. Shaft gives motion to the pump 46 through disk-86 and'pin 97 and drives conveyer 94 through gears 85 and 95. Binder is supplied to the suction pipe, which is shown broken oft', and earth or other material to be mixed or reduced is placed in the hopper.

By having a great number of projections on the rotary scraper and turning it at a a high rate of speed, each projection receives a small quantity of binder and a small quantit finerly separated .and rubbed together durfin'g the downward and backward stroke of the projections.

As each particle yof material is moved rearwardly by the fast .revolving projections it is discharged thus accomplishing the reduction and mixture in so short a time as to enable the use of a binder in a melted condition that will congeal-at normal temperature, the mixture being complete before congealing can take place. The `work has been done and a good mixture made of road-inaterial at or near the freezing point, the

binder being a heavy asphalt in melted condition that congeals at normal tempera.- ture, in like manner heavy coal tar has been mixed with coal clay bythe machine em-` bodied in this specification.

It is .obvious that power applied to the pulley 87 will drive the rotary scraper, conveyer 94 and pump 46, and that any material placed in the hopper 92 will fall by gravity on'ithe conveyer and beconveyed within the path of projections25, at which point the material enters the periphery of the rotary scraper and passes below the shaft 19 from where it is discharged during a portion of the same revolution of the rotary scraper in which it was scraped from the mass of material entering from the conveyer.

' In operation the binder enters through pipe 53, where it is gathered by projections 25 on their downward movement. Each projection strikes the upper side of the road 65 material cutting or scraping a vthin portion ing roads and of material whlch enables them to bef.'

therefrom, the cut gradually diminishes in thickness as the projections 25 descend until the bottom of their stroke yis reached where nothing is cut.

rlhe action of the road material as it is scraped into scrapings is to move toward the axis of the rotary scraper asit is being scraped from the mass and until the lowermost point of the stroke is reached. As each of the proj ections pass the lowest oint in their travel and begin to ascend, t e scrapings move from the axis of the rotary scraper and fall from the reach of the projections.

The road material bothy in ascendingI and descending the projections rubs the .binder therefrom. The rubbing grate 34 has been found to aid in rubbing the material and binder together but good mixtures have been made without the grate, for this reason is is not desired to confine the invention to the use of the rubbing grate. Cold clay has been mixed with melted heavy asphalt and tar that were solid at normal temperature without the useof'grate 34.

The4 road binder mixing machine is of' chief importance for the mixing of a water proof binder with road material for surfachighways, but may be advantageously employed for the mixing of railroad beds, reservoir linings, cellarlinings, side walks, and the patching or repairing of roadways and the like. It is manifest that numerous changes may be made in the `de` tails set forth without vdeparture from the essentials of the invention.

Having described my invention, what 1 claim as new and'desire to secure by Letters Patent, is

1. ln a road binder mixing machine, the combination with a frame having ground engaging supports and provided with journal bearings, of a rotary scraper journaled in said bearings and constructed with a periphery presenting plural scraping edges, said scraper being arranged to scrape road material from a conveyer, a conveyer ar.

ranged approximately transverse to the axis of said scraper and located lower than the top of said scraper and constructed to force road material within the sweep of said scraping edges, and binder serving devices arranged to discharge binder in close proximity to the scraper whereby the binder and the scrapings are at once associated and discharged from the scraper.

l 2. In a road binder mixing machine, the combination with a frame having ground engaging supports and provided with journal bearings, of a rotary scraperjournaled in said bearings and constructed with a perlphery presenting yielding plural scraping edges, said scraper being'arranged to scrape road material from a conveyer, a conveyer arranged approximately transverse to the axis of said scraper and located lower than 4 scraping edges, and binder serving devices 'a-rranged to discharge binder in close roximity to the said scraper whereby the binder and the scrapings are at once associated and n discharged from the' scraper.

3. In a road binder mixing machine, the combination' with a frame having ground engaging supports and provided with journalbearmgs, of a rotary scraper journaled in said bearings and constructed with radial elastic blades, said scraper being arranged to scrape road 'material `as said materlal is forced against it by a conveyer, a conveyer arranged land located lower than the top of said scraper and constructed to force road material against said scraper, a hopper located above said conveyer and communieating therewith, and binder serving devices f arran ed to spread binder upon said blades where y the binder and the scrapings are at once associated and discharged from the scraper.

4. In a road binder mixing machine, the combination with a frame having ground engaging supports and provided with journal bearings, of a rotary scraper journaled in said bearings and constructed with a periphery presenting plural scraping edges,

said scraper being arranged to scrape road material from a conveyer, a conveyer arranged and located lower than the top of said scraper and constructed to force road material against said scraper, a curved ating arranged contguously to the perip ery of saidl scraper whereby the scrapings are rubbed through the grating by the operation of the scraper, and binder serving devices arranged to spread binder upon the scraper whereby the binder and the scrapings are at once associated and discharged from the scraper.

5. In road binder mixing machines, the combination with a frame having ground engaging supports and rovided 'with journal bearlngs, of an orblta ly travellng scraper suitably connected to journals journaled'in said bearings, said scraper being constructed and arranged to scrape road material from a conveyer, a conveyer arran d approx1 mately transverse to the axis o said scraper and located lower than the to of the orbit of said scraper and constructe to force road material within said orbit, a hopper located above said conveyer and communicating therewith, and binder serving devices ar- WILLIAM F.'DAVIS.

Witnesses:

J. D. KIRKPATRICK, HENnm'rrA KmxrA'rnIcK. 

